PoC: SDL simu and WASM target

CMakeLists.txt

@@ -48,33 +48,66 @@ if(EdgeTX_SUPERBUILD)
 
   # Add explicit targets for triggering cmake in the external projects
   set_property(DIRECTORY PROPERTY EP_STEP_TARGETS configure clean)
-
-  # Native targets
-  ExternalProject_Add(native
+  
+  # ARM targets
+  ExternalProject_Add(arm-none-eabi
     SOURCE_DIR ${CMAKE_SOURCE_DIR}
-    BINARY_DIR ${CMAKE_BINARY_DIR}/native
+    BINARY_DIR ${CMAKE_BINARY_DIR}/arm-none-eabi
     CMAKE_ARGS ${CMAKE_ARGS} -Wno-dev -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
     CMAKE_CACHE_ARGS
-      -DCMAKE_TOOLCHAIN_FILE:FILEPATH=${CMAKE_SOURCE_DIR}/cmake/toolchain/native.cmake
+      -DCMAKE_TOOLCHAIN_FILE:FILEPATH=${CMAKE_SOURCE_DIR}/cmake/toolchain/arm-none-eabi.cmake
       -DEdgeTX_SUPERBUILD:BOOL=0
-      -DNATIVE_BUILD:BOOL=1
+      -DNATIVE_BUILD:BOOL=0
     INSTALL_COMMAND  ""
     EXCLUDE_FROM_ALL TRUE
     )
 
-  # ARM targets
-  ExternalProject_Add(arm-none-eabi
+  # Native targets
+  ExternalProject_Add(native
     SOURCE_DIR ${CMAKE_SOURCE_DIR}
-    BINARY_DIR ${CMAKE_BINARY_DIR}/arm-none-eabi
+    BINARY_DIR ${CMAKE_BINARY_DIR}/native
     CMAKE_ARGS ${CMAKE_ARGS} -Wno-dev -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
     CMAKE_CACHE_ARGS
-      -DCMAKE_TOOLCHAIN_FILE:FILEPATH=${CMAKE_SOURCE_DIR}/cmake/toolchain/arm-none-eabi.cmake
+      -DCMAKE_TOOLCHAIN_FILE:FILEPATH=${CMAKE_SOURCE_DIR}/cmake/toolchain/native.cmake
       -DEdgeTX_SUPERBUILD:BOOL=0
-      -DNATIVE_BUILD:BOOL=0
+      -DNATIVE_BUILD:BOOL=1
     INSTALL_COMMAND  ""
     EXCLUDE_FROM_ALL TRUE
     )
 
+  # Webasm targets
+  if(ENABLE_WASM)
+    if(NOT DEFINED $ENV{EMSCRIPTEN_ROOT})
+      # fetch EMSCRIPTEN_ROOT
+      message("-- Retrieving EMSCRIPTEN_ROOT")
+      execute_process(COMMAND
+        em-config EMSCRIPTEN_ROOT
+        OUTPUT_VARIABLE EMSCRIPTEN_ROOT
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+      )
+    else()
+      message("-- Using EMSCRIPTEN_ROOT from environment")
+      set(EMSCRIPTEN_ROOT $ENV{EMSCRIPTEN_ROOT})
+    endif()
+
+    set(EMSCRIPTEN_TOOLCHAIN_FILE ${EMSCRIPTEN_ROOT}/cmake/Modules/Platform/Emscripten.cmake)
+    message("-- EMSCRIPTEN_ROOT = ${EMSCRIPTEN_ROOT}")
+    message("-- EMSCRIPTEN_TOOLCHAIN_FILE = ${EMSCRIPTEN_TOOLCHAIN_FILE}")
+
+    ExternalProject_Add(wasm
+      SOURCE_DIR ${CMAKE_SOURCE_DIR}
+      BINARY_DIR ${CMAKE_BINARY_DIR}/wasm
+      CMAKE_ARGS ${CMAKE_ARGS} -Wno-dev -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
+      CMAKE_CACHE_ARGS
+        -DCMAKE_TOOLCHAIN_FILE:FILEPATH=${EMSCRIPTEN_TOOLCHAIN_FILE}
+        -DEdgeTX_SUPERBUILD:BOOL=0
+        -DNATIVE_BUILD:BOOL=1
+        -DDISABLE_COMPANION:BOOL=1
+      INSTALL_COMMAND  ""
+      EXCLUDE_FROM_ALL TRUE
+      )
+  endif()
+
   add_custom_target(configure
     DEPENDS native-configure arm-none-eabi-configure)
 
@@ -93,6 +126,13 @@ if(EdgeTX_SUPERBUILD)
     DEPENDS native-configure
     )
 
+  if(ENABLE_WASM)
+    add_custom_target(wasm-simu
+      COMMAND $(MAKE) -C wasm simu
+      DEPENDS wasm-configure
+      )
+  endif()
+
   add_custom_target(companion
     COMMAND $(MAKE) -C native companion
     DEPENDS native-configure
@@ -127,8 +167,6 @@ if(EdgeTX_SUPERBUILD)
   return()
 endif()
 
-enable_language(ASM)
-
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/cmake)
 include(GenericDefinitions)
 
@@ -139,10 +177,15 @@ else()
 endif()
 
 if(NATIVE_BUILD)
-  include(NativeTargets)
+  if(NOT EMSCRIPTEN)
+    include(NativeTargets)
+  endif()
 else()
   # Prevent CMake warnings
   set(IGNORE "${SDL2_LIBRARY_PATH}" "${LIBSSL1_ROOT_DIR}" "${OPENSSL_ROOT_DIR}")
 endif()
 
+# Prevent CMake warnings
+set(IGNORE "${ENABLE_WASM}")
+
 add_subdirectory(${RADIO_SRC_DIR})

cmake/FetchImgui.cmake

@@ -0,0 +1,26 @@
+# Fetch imgui source code from Github
+
+include(FetchContent)
+
+FetchContent_Declare(
+  imgui
+  GIT_REPOSITORY https://github.com/ocornut/imgui
+  GIT_TAG        dbb5eeaadffb6a3ba6a60de1290312e5802dba5a # v1.91.8
+  SOURCE_DIR     imgui
+)
+
+FetchContent_MakeAvailable(imgui)
+
+add_library(imgui STATIC
+  imgui/imgui.cpp
+  imgui/imgui_draw.cpp
+  imgui/imgui_tables.cpp
+  imgui/imgui_widgets.cpp
+  imgui/backends/imgui_impl_sdl2.cpp
+  imgui/backends/imgui_impl_sdlrenderer2.cpp
+)
+
+target_include_directories(imgui PUBLIC
+  ${CMAKE_CURRENT_BINARY_DIR}/imgui
+  ${CMAKE_CURRENT_BINARY_DIR}/imgui/backends
+)